838857782992 has 120 divisors (see below), whose sum is σ = 1742211884160. Its totient is φ = 390733244160.

The previous prime is 838857782969. The next prime is 838857783017. The reversal of 838857782992 is 299287758838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72767533 + ... + 72779059.

It is an arithmetic number, because the mean of its divisors is an integer number (14518432368).

Almost surely, 2^838857782992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 838857782992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871105942080).

838857782992 is an abundant number, since it is smaller than the sum of its proper divisors (903354101168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

838857782992 is a wasteful number, since it uses less digits than its factorization.

838857782992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11729 (or 11676 counting only the distinct ones).

The product of its digits is 975421440, while the sum is 76.

The spelling of 838857782992 in words is "eight hundred thirty-eight billion, eight hundred fifty-seven million, seven hundred eighty-two thousand, nine hundred ninety-two".